I have a Dell usb C dock that I got from a company that was going to trow it away. My issue is with charging. It used to work with the Dell laptops they were using, but it has a weird behavior with my HP laptop. If I connect the laptop to the dock when the laptop is off, charging works. If I instead plug in the laptop while it's running, most of the times it doesn't start charging it. I have either to disconnect and reconnect a few times, or I have to pull the dock's plug and reinsert it again. Any idea why? Did anyone else observe a similar behavior?